Since none of us know your fish the way you do it's tough to make recomindations. I always move things around based on the interaction I get and the personality of the fish. I know you get an idea and sometimes just need to bounce it around a little to see what everybody else thinks and once in a while somebody throughs somthing out you didn't think of. I'd start with the BBs and Argentea in the 72, Cubans in the 60 and the Freddi's in the 48, put the Cutteri in the 72 as a distraction and see how that flys. All the fish are great looking specimans deciding who stays and who goes is never easy. Good luck and keep us posted with your final decision and how it all works out.
Funny, that's exactly what I am leaning towards stock wise. Might put the cutteri in the 48" though, or possibly sell them. I do really like them but good LORD they are mean little fish when spawning!